Feeder for type-casting machines



Jan: 13,1931# J, H. mem-AN i y' 1,788,612

y y FEEDER FOR TYPE` CASTIG MACHINES I U Filed March i 1930' 2 Sheets-*sheet 2A tion of the member 32 and no movement of either of the escapement bars and 21. If, however, the level of the metal in the pot drops below the level shown, thus raising the outer end of the lever 36, such lever will, on the movement of the pot to the lleft engage the hook 39, thus rocking the arm 31 so that the arms 26 and 27 are rocked upward releasing the bar 20 'from the 'tooth of the escapement wheel 19 and at the same time permitting the bar 21 to move up so as to catch the next tooth of the wheel. The yrelease of the wheel by the bar 20 permits the wheel 19 to rotate in the direction of the arrow (Fig. 6) a distance equal' to the lengthof one-half of a tooth, at which time the bar 21 engages the next tooth 40 (Fig. 6). This movement ofv the wheel permits the shaft 28 to rotate slightlythus lowering the pig 12to supply o more metal to the pot. On the movement of the pot back tothe right to the starting position, a bar 41, also secured to the top of the pot 1, engages the lever 31, thus rocking the shaft 28 and arms 26 and 27A to return them to the position of Fig. 5. This releases the bar 21 from the wheel 19 and causesv the bar 20 to engage .it again. This permits the wheel 19 to again rotate the distancev of one-half of a tooth, so that on each complete oscillation of the pot, the wheel 19 is permitted to move ahead a distance equal to the length of one tooth, and the pig 12 is lowered correspondingly. The escapement is thus operated whenever thelevel of the metal in the pot` drops below a predetermined level, which can be regulated byadjusting the vertical position of the casing 7 and the parts carried thereby on the standard 5.v When the level of the metal is 'at or above the predetermined.

level, the outer end ofthe lever 36 lies at nonengaging `position with l respect to the hook arm 32, so that the back and forth movement 'of the pot has no effect upon the escapement,

and the pig 12 remains in fixed position until Y the level of the metal in the pot is lowered to the level which itis desired to maintain.

What I claim is:`

1. In a typemetal casting machine hav ing a tilting melting pot, a toothed escapement wheel, a pair of escapement bars for controlling the movement of the wheel arranged to alternately engage the wheel and prevent its rotationbut permitting a limited rotation during the shifting of the lingers, a rocker arm for causing one bar to engage the wheel and release the other therefrom, fiexible means governed'by the movement of the wheel for supporting a pig of ytype metal above the pot so that the pig is fed downward into the pot by the movement of the wheel, a fioat in the pot, an arm pivotedl on the pot having one end connected to the float and the other end positioned so as to move said rocker armv in one direction when the level of the metal in the pot drops below a certain level,

and another arm fixed on the pot and adapted to engage the rockerarm and move it back to starting position on the reverse movement of the pot.

2. In a type metal casting machine having a tilting melting pot, a toothed escapement wheel, a pair o f movable fingers for restraining the movement of the wheel arranged so that when one finger engages the wheel, the other is disengaged therefrom, flexible means for supporting a type metal pig above the pot having one portion thereof restrained by the wheel so that the rotation of the wheel permits the pig to be fed downward into the pot, a member operated by the tilting of the pot in one direction for moving one finger out of engagement with the wheel while theother is caused to engage it, means for bringing the fingerstback to their first position on the reverse movement of the pot, and means controlled by the level of the metal in the pot :forv governing the actuation of said member.

3. In a type metal casting machine having a tilting melting pot,.a tOOthed'eSCapement wheel,a pair'of movable fingers for restraining` the movement of the wheel arranged so that when one finger engages the wheel the other is disengaged therefrom, flexible means for supporting a type metal pig above the pot having one portionthereof restrained bythe wheel so that the rotation of the wheel permits theL ig to vbe fed downward into the pot, a rocEer arm operated lby the tilting of the pot in one direction for moving one fingerout of contact with the wheel while the other is caused to engage it, and means operated by pot for bringing the fingers back to their first position. f

Ll. In a type metal casting machine having a tilting melting pot, a toothed escapement wheel, a pair of movable fin ers for restraining the movement of the w eel arranged so that when one finger engages the wheel the other is disengaged therefrom, flexible means for supporting a type metal lpi above the pot having one-portion thereo restrained y the wheel so that the rotation of the wheel permits the pig to be fed downward into the pot, la float in the pot, a member Whose position is re ulatedfby the float, an arm operated by t e memberv when the pot tilts in one direction for moving oneof .said fingers out of engagement with the wheel and the reverse movement yof they the other finger into engagement with it, and

Hmeans for bringing the fingers back to their first position on the reverse movement of the pot, said member being arrangedA so that when the level of the metal in the pot drops below a certain point such member will rnot engage and operate said arm.

5. In a ty e metal casting machine having a tilting me ting pot, a vtoothed escapement wheel, a pair of movable fingers for restraining the movement ofthe wheel arranged so that when one iin er engages the wheel the other is disengageg therefrom, flexible means for supporting a type metal pig above the pot having one portion thereof restrained by the wheel so that the rotation of the wheel permits the pig to be fed downward into the` pot, a float in the pot, a member whose position is regulated by the float, means operated 1o by the member when the pot tilts in one direction formoving one of said fingers out of engagement with rthev wheel and the other finger into engagement with it, and a stop member on the pot for bringing the fingers 15. back to 'their first position on .the reverse movement of the potsaid means which is roperated by said member being so arranged that when the level of the metal in thev ot drops below a certain point, such mem er will not engage said means.

6. In a type casting machine having a tilt ing melting pot, a flexible member for supporting a type metal pig above the pot, an escapement wheel with a series of stop elements arranged around the center of rotation thereof, a pair of escapement lingersv arranged to engage said elements,rmean`s operated'by the tilting movement of the pot for moving one of the lingers into'engaging position with respect to said elementswhile t i the other is moved out of engaging position, and then reversing their movement, and means controlled by the level of the metal in the pot .for governing the operation of '35 said means.

7. In a, type casting machine having a tilting melting pot, a flexible member for supporting a type metal pig above the pot, an escapement wheel with a series of stop ele- 40 ments arranged around the center of rotation thereof,'a pair of escapement lingers arranged to engage said elements, means operated by the tiltingmovement of the. pot for moving one of the fingers into engaglng po- 45 sition with respectto said elements while l 55 ruary, 1930.

the other is moved out of engagingl position, and then reversing their movement, and a float in the pot arranged to cause said means Y to operate when the level of the metal drops below a certain point and to'move said means to non-operative position when said level rises above a certain point.` In testimony whereof, I have-hereunto Asubscribed my. namethis v28th day Aof Feb- JOHN H. HOFFMAN. 

